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TY - CONF AU - Kotaka, Y. AU - Goto, A. AU - Hatanaka, K. AU - Imai, N. AU - Kase, M. AU - Muto, H. AU - Nagatomo, T. AU - Nakagawa, T. AU - Ohnishi, J. AU - Ohshiro, Y. AU - Sakemi, Y. AU - Shimoura, S. AU - Yamaguchi, H. ED - Schaa, Volker RW ED - Jansson, Andreas ED - Shea, Thomas ED - Olander, Johan TI - Development of the Calculation Method of Injection Beam Trajectory of RIKEN AVF Cyclotron with 4D Emittance Measured by the Developed Pepper-Pot Emittance Monitor J2 - Proc. of IBIC2019, Malmö, Sweden, 08-12 September 2019 CY - Malmö, Sweden T2 - International Beam Instrumentation Conferenc T3 - 8 LA - english AB - The Center for Nuclear Study, the University of Tokyo and RIKEN Nishina Center have been developing the AVF Cyclotron system at RIKEN. One of the important developments is to improve the transport system of the injection beam line. The transport efficiencies tend to decrease as beam intensities increase. To solve this problem, we developed the calculation method to trace a beam trajectory with a four-dimensional (4D) beam emittance measured by pepper-pot emittance monitor (PEM) as initial value. The reason for using the 4D beam emittance is that the transport system has rotating quadrupole magnets and solenoid coils, and that the space charge effect can be introduced. The beams through a pepper-pot mask can be detected on the potassium bromide fluorescent plate inclined 45 degree to the beam to be recorded by digital camera using developed PEM. We compared the calculated beam trajectory with the measurement of other beam diagnostics and quantified the degree of fit. It has been found that the degree of fit is improved by changing fiducial points on the fluorescent plate and optimizing the thickness of the fluorescent agent and the exposure time and gain of the digital camera. PB - JACoW Publishing CP - Geneva, Switzerland SP - 351 EP - 354 KW - emittance KW - cyclotron KW - space-charge KW - injection KW - ECR DA - 2019/11 PY - 2019 SN - 2673-5350 SN - 978-3-95450-204-2 DO - doi:10.18429/JACoW-IBIC2019-TUPP022 UR - http://jacow.org/ibic2019/papers/tupp022.pdf ER -